fix(ecstore): harden runtime read-path quorum handling (#2872)

crates/io-metrics/src/lib.rs

@@ -65,6 +65,7 @@ pub mod lock_metrics;
 pub mod performance;
 pub mod process_lock_metrics;
 pub mod sampler;
+pub mod system_path_metrics;
 pub mod timeout_metrics;
 
 pub use autotuner::{AutoTuner, TunerConfig, TuningResult};
@@ -121,6 +122,7 @@ pub use sampler::{
     ProcessResourceSnapshot, ProcessStatusSnapshot, ProcessSystemSnapshot, snapshot_process_platform, snapshot_process_resource,
     snapshot_process_resource_and_system, snapshot_process_system,
 };
+pub use system_path_metrics::record_system_path_failure;
 
 // Timeout metrics exports
 pub use timeout_metrics::{

crates/io-metrics/src/system_path_metrics.rs

@@ -0,0 +1,23 @@
+// Copyright 2024 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+pub fn record_system_path_failure(path_kind: &'static str, operation: &'static str, reason: &'static str) {
+    counter!(
+        "rustfs_system_path_failures_total",
+        "path_kind" => path_kind,
+        "operation" => operation,
+        "reason" => reason
+    )
+    .increment(1);
+}